docs: def get_channel_groups(self, channel_ids):
          '''This function returns the group of each channel specifed by
          channel_ids
  
          Parameters
          ----------
          channel_ids: array_like
              The channel ids (ints) for which the groups will be returned
  
          Returns
          ----------
          groups: array_like
              Returns a list of corresonding groups (ints) for the given
              channel_ids
          '''
          groups = []
          for channel_id in channel_ids:
              group = self.get_channel_property(channel_id, 'group')
              groups.append(group)
          return groups